Cooling system for internal-combustion engines



Jan. 20,'1931- J. z. BRUBAKER 1,789,540

COOLING SYSTEM FOR INTERNAL COMBUSTION HGINES Filed oct. 41929 2sheets-sheet 1 Jan. 2o, 1931.

J. Z. BRUB-AKER lCOOLING SYSTEM FOR INTERNAL COMBUSTIN ENGINES .Filedoct. 4. 1,929

z suegra-smv? v Patat-e j. 20, 1793i JACOB Z. BRUBAK, F MANHEHE,PENNSYLVANIA.'

.u sas non INTERNAL-connus'rron mientas' applicatie; fue@ october .4,1929. sealan. 397,279.

rI he object of my invention is to provide an improved cooling systemfor an internal combustion engine; and to provide) a novel combinationof a thermo-Siphon system and force or pump system whereby thetemperature of the cylinder block may be maintained at a desired.temperature and the temperature of e cylinder head. maintained at a,different desired temperature'. Itis also anobject ,m of mylinvention toprovide: a system that 'll be more eficient `than 'either of the twosystems used singly, and which will facilitate operating of the enginein cold weather.

I-attain these and other objects of my invention by the mechanismillustrated in the accompanying drawings, in whichl Figure 1" is aperspective view of my invention applied to an internal combustionengine;

Fig. 2 is a top plan of same;

Fi 3 is a detail view of the gasket partition with a portion of samebroken away;

Fig. 4 is a detail sectional view on line L -4 4ofFig.? .f

Fig. 5 is a diagrammatic view of the form of the invention'havinga'vertical radiator partition (at the left), and a similar diagrammaticview of a preferred form of the invention having a horizontal radiatorpartition (at the right), and

Fig. .6 is a side elevation of the preferred form of my invention havinga horizontal partition through the radiator;

Fig. 7 is a top plan view of same; and

Fig. 8 is a front elevation with portions of same broken away.

Like characters of reference designate like parts in each of the severalviews.

l Referring to the accompanying drawings, 40 I provide a radiator whichis separated into two chambers or sections 5 and '13 by a suitablepartition, such as the vertical partition 16, as shown in Fig. 41, orthe horizontal partition 17, as shown diagrammatically in Fig. 5 (at-theright) and Figs. 6, 7 and 8. I provide a force or pump system of coolingfor the cylinder block which system is connected with the radiatorsection 5; and I also provide a thermosyphon cooling system for thecylinder head which-is connected with the section 13 of the radiator. Inthedrawings, there is illustrated a suitable pump 1 connected by conduit2 lwith the cylinder block 3. rlhe cylinder block in turn is connectedby conduit 4 with the radiator section 5; and the radiator section 5 inturn is in communication from its bottom portion with the cylinder pumpthrough the conduit, 6, thus providing a complete circulating system ofthe pump or force feed type. 60

Connected with the radiator section 13 is the thermosyphon system,consisting of the manifold 11 which communicates with the cylinder head10 and with the radiator section 13 through the pipe 12.y A return vcon-.65

. duit14 extends' from' the bottom of the radiator section 13 to thecylinder head 1 0. I provide a gasket partition 7 separating thecylinder block 3 from the cylinder head 10. This gasket partition isprovided with the caps 8 which in turn have the slots 9, therebyproviding small communicating passages betweenthe cylinder block andcylinder head. As shown in Figs. 1 and 2, the radiator partition 16 ispositioned at one side of the radiator cap, and a small passage 15, asshown in Fig. 1, is' provided in the bottom ofthe radiator partition 16;or when a form of the invention is used in which a horizontal. partition17 is utilizedJ as shown in the small diagrammatic view at the right ofFig. 5, andpFigs. 6, 7 and'8. I provide similar passages 15 at each endof the said partition 17 having a function similar to that of passage 15of the form of the apparatus having the vertical partition for the pas-`sage of water between sections =5 and 13 at a` slow rate.

Heretofore it has been the usual practice in.Y cooling motors'to have asingle water jacket around the cylinders and valves, the water enteringvthe lower part of the cylinder block and being emitted through portsfrom the cylinder block into the cylinder head and then into theradiator for cooling. In such a system the cylinder block and cylinderhead have almost the same temperature. This is a situation which is notcalculated to attain the most eicient operation of the y motor. In suchan ordinary cooling system a motor will develop the most power at acertain temperature due to the fact that as cools the cylinder headnormally maintainsahigher temperature than a pump or force system suchas is used by me in cooling the cylinder block. Consequently I have ahot cylinder head and a well-cooled cylinder block and thereby obtain ahigher motor eficiency. A further advantage attained is that the engineis easier to operate in coolweather due to the -fact that the cylinderblock and head are both warmed up more quickly than in the old system,with the result of better acceleration, and more eicient performance ofthe engine. This is' due to the. fact that with `my system the` pump 1forces the water through conduit 2 into block 3 and thence through theports 8 and 9 into the cylinder lhead 10 from which it Hows through theconduit 14 to'the bottom of the radiator section 13' and thence throughpassage 15 to the other radiator section 5 and thence back throughconduit 6 to the pump 1. This` path of circulation continues for a shorttime. As soon as the thermo-system from the cylinder head gets hot thecirculation changes. The water flows through the manifold 11`and conduit12 into duit 14' back to the cylinder head 10 while part of the waterflows through the passage 15 into the radiator section 5 at the bottomand through the force feed or pump cooling system. p f v My preferredform of the invention is shown diagrammatically in the small view at theri ht of Fig. 5,'and in Figs. 6, 7 and 8 the ra iator partition 17beingdisposed horizontally vto divide the radiator into the section 13which is connected by the conduits 12 and 14 with the thermo-syphon partof the' system while the radiator section 5 is connected by the conduits4 and 6 with the force or pump part of the cooling system. The Inode ofoperation-is the same or equivalent to that in the form of inventionillustrated with the vertical partition 16 except that I rovide twosmall passages 15* at each end -o the horizontal partition 17 which havea function similar to the small passage 15 ,at the bottom of thevertical artition 16. This construction is believed to somewhat moreefiicient than the one illustrated in detail by reason of the Ashorterpipes or conduits which can be used with it. Also in this form thecooler section ofthe radiator is at the vbottom and the warmer sectionat the top, thus making use of the natural tendency of the hot water torise.

What I claim is:

1. In a cooling system for an internal combustion engine, thecombination of a thermosyphon cooling system connected with the cylinderhead, a force feed cooling ,System connected with the cylinder block,and a gasket partition substantially se arating the cylinder block andthe cylin er head and reducing the water circulation between same.

2. In a cooling system for an internal combustion engine, thecombination of two cooling systems, one of said coolin systems belngconnected with the cylin erv head. and

the other of said systems being connected.

with the cylinder block, the system connected with the cylinder blockbeing arran ed to constantly maintain its temperature su antially lowerthan the temperature of the cylinder head, whereby to increase theoperating eciency of the engine.

3. In a cooling system' for an internal combusti on engine, thecombination of a thermosyphon cooling system vconnected with thecylinder head, a force feed cooling system connected with the cylinderblock, a gasket partition disposed between the cylinder block and thecylinder head, said partition having small ports to permit a limitedwater'circulation, a radiator having a. partition dividing it intosections, the thermo-syphon sys- Y tem'being connected with one of thesections and the yforce feed system'being connected with the othersection, and means'forthe passage of water to a limited extent fromradiator section 13 and thence through conlone Section to the other' andpassages for a limited flow of water/from one section to the other. A

JACOB Z. BRUBAKER.

